Earthquake with magnitude of ML 2.0 on date 29-07-2018 and time 01:43:10 (Italy) in region 1 km SW Sant'Alfio (CT)

A magnitude ML 2.0 earthquake occured in region: 1 km SW Sant'Alfio (CT), on

  • 28-07-2018 23:43:10 (UTC)
  • 29-07-2018 01:43:10 (UTC +02:00) Italian time

and geographic coordinates (lat, lon) 37.74, 15.13 at 15 km depth.

The earthquake was located by: Bollettino Sismico Italiano INGV.

Search earthquakes: Any within 30 km radius

The values of hypocentral coordinates and magnitude may be revised at a later time as more information becomes available.

Municipalities within 20 km from the epicenter

Distances are determinated based on the geographic coordintes of the (Istat).
Municipality Region Dist Inh Cum Inh
Sant'Alfio CT 1 1582 1582
Milo CT 2 1087 2669
Giarre CT 5 27659 30328
Zafferana Etnea CT 5 9517 39845
Santa Venerina CT 5 8592 48437
Mascali CT 6 14282 62719
Riposto CT 6 14838 77557
Piedimonte Etneo CT 9 3963 81520
Fiumefreddo di Sicilia CT 9 9623 91143
Linguaglossa CT 12 5403 96546
Calatabiano CT 13 5308 101854
Acireale CT 14 52622 154476
Trecastagni CT 14 10910 165386
Viagrande CT 14 8563 173949
Aci Sant'Antonio CT 14 17984 191933
Pedara CT 15 14102 206035
Aci Catena CT 15 29851 235886
Aci Bonaccorsi CT 15 3524 239410
Gaggi ME 16 3184 242594
Castiglione di Sicilia CT 16 3215 245809
Nicolosi CT 16 7463 253272
Giardini-Naxos ME 17 9415 262687
Valverde CT 17 7840 270527
San Giovanni la Punta CT 18 23060 293587
Motta Camastra ME 18 845 294432
Taormina ME 18 10960 305392
Tremestieri Etneo CT 19 20589 325981
Francavilla di Sicilia ME 19 3945 329926
Castelmola ME 19 1088 331014
San Gregorio di Catania CT 19 11966 342980
Graniti ME 19 1492 344472
Mascalucia CT 19 31958 376430
Moio Alcantara ME 20 717 377147
Aci Castello CT 20 18723 395870

Municipalities with at least 50000 inhabitants

An earthquake occurred to
14 Km N of Acireale (52622 inhabitants)
26 Km N of Catania (314555 inhabitants)
61 Km SW of Reggio di Calabria (183035 inhabitants)
63 Km SW of Messina (238439 inhabitants)
76 Km N of Siracusa (122291 inhabitants)
97 Km NE of Ragusa (73313 inhabitants)
98 Km E of Caltanissetta (63360 inhabitants)
Recent and historical Seismicity

These maps show the seismicity for different time windows. The earthquake locations reported in these maps are determined in quasi real-time by the personnel on duty in the seismic surveillance center of INGV in Rome. Note that the earthquake source parameters (hypocentral location and magnitude) are the best estimates obstained with the available data and they are adjourned as additional data become available. The source parameters obtained by the personnel on duty are then revised by the group in charge of the INGV Seismic Bulletin (Bollettino Sismico Italiano dell’INGV).

Earthquakes of the last three days (72 hours)

Earthquakes of the last three days (72 hours) *

This map reports the earthquake epicenters located in the past 72 hours (3 days) from the time this page has been generated. The radius of the circle representing the earthquake on the map scales with magnitude. The color depends on the time of occurrence of the earthquakes with respect to the time of generation of the map (red = 1 hour; orange = 24 hours; yellow = 72 hours). The open star shows the epicenter of the current earthquake.
Earthquakes of the last 90 days

Earthquakes of the last 90 days *

This map reports the Magnitudo ≥ 1.0 earthquake epicenters located using the data acquired by the Italian National Seismic Network and by other collaborating networks in Italy and in the neighbouring countries. The radii of the circles representing the epicenters on the map scale with magnitude. The color of each circle depends on the time of occurrence of the earthquakes with respect to the time of generation of the map (red = 1 hour; orange = 24 hours; yellow = 72 hours; blue = all other earthquakes). The open star shows the epicenter of the current earthquake.
Earthquakes since 1985

Earthquakes since 1985 *

This map reports the Magnitudo ≥ 2.5 earthquake epicenters located using the data acquired by the Italian National Seismic Network and by other collaborating networks in Italy and in the neighbouring countries. The radii of the circles representing the epicenters on the map scale with magnitude. The color of each circle depends on the time of occurrence of the earthquakes with respect to the time of generation of the map (red = 1 hour; orange = 24 hours; yellow = 72 hours; blue = all other earthquakes). The open star shows the epicenter of the current earthquake.
Earthquakes since 1000 AD until 2014

Earthquakes since 1000 AD until 2014 *

This map shows the epicenters of the historical earthquakes catalogue CPT15 (Catalogo Parametrico dei Terremoti Italiani, 2015 version https://emidius.mi.ingv.it/CPTI15-DBMI15/) with estimated magnitude ≥ 5.0 since 1000 AD until 2014. The epicenters are represented by squares which sides scale with the estimated earthquake magnitude. For earthquakes with magnitude ≥ 6.0, it is also shown the year of occurrence and the magnitude value. The open star shows the epicenter of the current earthquake.
Seismic hazard
Shakemap
Felt maps
The earthquake effects in MCS scale as obtained from the compiled questionnaire

The earthquake effects in MCS scale as obtained from the compiled questionnaire *

This map shows the distribution of the effects of the earthquake on the territory in terms of the MCS (Mercalli-Cancani-Sieberg) intensity scale. The intensities are determined using the data provided in the questionnaire (http://www.haisentitoilterremoto.it/) that are analysed using robust statistical techniques since they are not verified individually. Specifically, the assignment of MCS intensities greater or equal the VI degree of the MCS scale require opportune in situ verification by professional experts. The purple start shows the epicenter. This map is prepared every so often that the population fill in new questionnaires. The number of questionnaires used to determine the map and the date and time of the last adjournment are shown in the upper right part of the panel.
Locations history
Type Magnitude Date and Time (UTC) Latitude Longitude Depth (km) Published time (UTC) Author Location ID
Rev 1000 ML 2.0 2018-07-28
23:43:10
37.74 15.13 15 2019-04-24
14:51:00
Bollettino Sismico Italiano INGV 64680521
Rev 100 ML 2.0 2018-07-28
23:43:10
37.71 15.19 3 2018-07-28
23:50:08
Sala Sismica INGV-Roma 59160641
Preferred location and magnitude until now.
Origin information

Origin

Field Value
Time (UTC) 2018-07-28 23:43:10 ± 0.17
Latitude 37.74 ± 0.01
Longitude 15.13 ± 0.01
Depth (km) 15 ± 2 (from location)
Evaluation mode of Origin manual
Evaluation status of Origin reviewed
Version 1000 -> BULLETIN-INGV
Event type earthquake
Origin ID 64680521

Uncertainty

Field Value
Preferred uncertainty description uncertainty ellipse
Semi-major axis of confidence ellipse (meter) 1157
Semi-minor axis of confidence ellipse (meter) 108
Azimuth of major axis of confidence ellipse. Measured clockwise from South-North direction at epicenter (gradi) 259
Circular confidence region, given by single value of horizontal uncertainty (meter) 1160
Confidence level of the uncertainty (%) 68

Quality

Field Value
Largest azimuthal gap in station distribution as seen from epicenter (degree) 128
Number of associated phases, regardless of their use for origin computation 23
Number of defining phases 23
RMS of the travel time residuals of the arrivals used for the origin computation (sec) 0.44
Epicentral distance of station closest to the epicenter (degree) 0.04676
Epicentral distance of station farthest from the epicenter (degree) 0.7995
Number of stations at which the event was observed 13
Number of stations from which data was used for origin computation 13
Magnitudes information

ML:2

Field Value
Value 2
Uncertainty 0.4
Num. used stations 10
Type of magnitude ML
Reference to an origin 59160641
Agency INGV
Autore Sala Sismica INGV-Roma
Time of creation (UTC) 2018-07-28 23:50:08

ML:2

Field Value
Value 2
Uncertainty 0.3
Num. used stations 10
Type of magnitude ML
Reference to an origin 64680521
Agency INGV
Autore Bollettino Sismico Italiano INGV
Time of creation (UTC) 2019-03-26 12:23:21
Picking and Arrival
SCNL Time Uncertainty Polarity Evaluation_mode Phase Azimuth Distance Takeoff_angle Residual Weight
IV.SSY.HHZ. 2018-07-28T23:43:31.43 0.1 undecidable manual S 185 0.5801 95 1.02 65
IV.GALF.HHZ. 2018-07-28T23:43:27.82 0.6 undecidable manual S 267 0.4497 96 1.27 30
IV.HAGA.HHZ. 2018-07-28T23:43:26.74 0.3 undecidable manual S 178 0.4515 96 0.14 67
IV.RAFF.HHZ. 2018-07-28T23:43:25.64 0.1 undecidable manual P 230 0.7995 93 -0.18 83
IV.MUCR.HHZ. 2018-07-28T23:43:24.65 0.3 undecidable manual S 326 0.3687 98 0.47 64
IV.IVPL.HHZ. 2018-07-28T23:43:23.36 0.3 undecidable manual P 349 0.6511 94 0.07 65
IV.SSY.HHZ. 2018-07-28T23:43:22.34 0.1 undecidable manual P 185 0.5801 95 0.26 85
IV.NOV.HHZ. 2018-07-28T23:43:22.21 0.6 undecidable manual S 0 0.2914 102 0.29 45
IV.EPZF.HHZ. 2018-07-28T23:43:21.16 0.6 undecidable manual S 292 0.2356 106 0.83 39
IV.AIO.HHZ. 2018-07-28T23:43:20.92 0.6 undecidable manual S 18 0.2473 105 0.27 45
IV.GALF.HHZ. 2018-07-28T23:43:20.01 0.3 undecidable manual P 267 0.4497 96 0.15 67
IV.HAGA.HHZ. 2018-07-28T23:43:19.23 0.3 undecidable manual P 178 0.4515 96 -0.66 59
IV.MUCR.HHZ. 2018-07-28T23:43:18.12 0.3 undecidable manual P 326 0.3687 98 -0.37 65
IV.EPOZ.HHZ. 2018-07-28T23:43:18.06 0.6 undecidable manual S 146 0.0773 144 1.68 25
IV.ESLN.HHZ. 2018-07-28T23:43:16.81 0.1 undecidable manual S 251 0.134 125 -0.76 78
IV.AIO.HHZ. 2018-07-28T23:43:16.28 0.1 positive manual P 18 0.2473 105 -0.17 94
IV.EVRN.HNZ. 2018-07-28T23:43:16.04 0.3 undecidable manual S 179 0.0468 157 0.09 74
IV.NOV.HHZ. 2018-07-28T23:43:16.89 0.1 undecidable manual P 0 0.2914 102 -0.29 90
IV.ESML.HHZ. 2018-07-28T23:43:15.86 0.3 undecidable manual P 240 0.2338 107 -0.37 67
IV.EPZF.HHZ. 2018-07-28T23:43:15.96 0.3 undecidable manual P 292 0.2356 106 -0.3 68
IV.ESLN.HHZ. 2018-07-28T23:43:14.13 0.1 undecidable manual P 251 0.134 125 -0.54 87
IV.EPOZ.HHZ. 2018-07-28T23:43:13.86 0.3 undecidable manual P 146 0.0773 144 -0.13 73
IV.EVRN.HNZ. 2018-07-28T23:43:13.74 0.1 undecidable manual P 179 0.0468 157 0.01 100
Station Magnitude and Amplitude
SCNL mag Generic_amplitude Period Type Category Unit Time_window_reference
IV.ESLN.HHN. ML:1.9 0.0006320335 0.576 AML other m 2018-07-28T23:43:16.98
IV.ESLN.HHE. ML:1.9 0.0006429661 0.4224 AML other m 2018-07-28T23:43:17.34
IV.AIO.HHN. ML:1.7 0.0002332549 0.2176 AML other m 2018-07-28T23:43:22.11
IV.EPZF.HHE. ML:2 0.00056187855 0.8064 AML other m 2018-07-28T23:43:21.76
IV.EPZF.HHN. ML:2.3 0.00099971975 0.3968 AML other m 2018-07-28T23:43:22.54
IV.NOV.HHE. ML:2.6 0.0017249055 0.64 AML other m 2018-07-28T23:43:23.04
IV.NOV.HHN. ML:2 0.00042719905 0.3072 AML other m 2018-07-28T23:43:23.44
IV.AIO.HHE. ML:1.6 0.00017648855 0.448 AML other m 2018-07-28T23:43:24.04
IV.SSY.HHN. ML:2.4 0.0005352509 0.2176 AML other m 2018-07-28T23:43:34.69
IV.SSY.HHE. ML:2.1 0.0002404658 0.256 AML other m 2018-07-28T23:43:35.40
TDMT - Time Domain Moment Tensor
Focal Mechanism in the area
Focal Mechanisms

Focal Mechanisms *

This map reports the focal mechanisms since 1977 in the region. The white and red beach ball symbols are mechanisms determined using the Regional Centroid Moment Tensor (RCMT, http://www.bo.ingv.it/RCMT) and are determined for earthquakes with magnitude larger than 4.5 in the Euro-Mediterranenan area. Occasionally, when there is a good source-receiver geometry of the target earthquake, the RCMT can be obtained also for earthquakes with magnitude larger than 4.0. The blue and white beach ball symbols indicate the mechanisms obtained from application of the Time Domain Moment Tensor (TDMT, http://terremoti.ingv.it/tdmt.html). This technique is used for M ≥ 3.5. The size of the beach ball sysmbol scales with the calculated moment magnitude, Mw.
Download
Type Description Link
QuakeML - small Event, Origin, FocalMechanism Download
QuakeML - full Event, Origin, FocalMechanism, Amplitude, Arrival, Pick, Station Magnitude Download
Waveforms Seismic signals in full SEED format Download